| 11. | Branches also supply sensation to the anal canal.
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| 12. | This angle prevents the movement of stool stored in the rectum moving into the anal canal.
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| 13. | These include the esophagus, pylorus of the stomach, distal duodenum, ascending colon, descending colon and anal canal.
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| 14. | Some other sources exclude the anal canal.
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| 15. | Complications include breakage of the encirclement material, fecal impaction, sepsis, and erosion into the skin or anal canal.
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| 16. | Most sources define the large intestine as the combination of the cecum, "'colon "', rectum, and anal canal.
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| 17. | Initially, the mass may protrude through the anal canal only during defecation and straining, and spontaneously return afterwards.
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| 18. | Intra-rectal pressure builds as the rectum fills with feces, pushing the feces against the walls of the anal canal.
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| 19. | Clinical trials also are open for prostate, anal canal and pancreatic cancer at the Arlington center through the cooperative.
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| 20. | In humans, the rectum is followed by the anal canal, before the gastrointestinal tract terminates at the anal verge.
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